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    CVE-2012-3517

    Use-after-free vulnerability in dns.c in Tor before 0.2.2.38 might allow remote attackers to cause a denial of service (daemon crash) via vectors related to failed DNS requests.

    Published:Aug 26, 2012
    Last Modified:Apr 11, 2025
    EPS:Aug 26, 2012
    EPSS Score:0.01461
    CVSS Score:5

    Affected Products

    Vendor
    Tor
    Product
    Tor

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2025-4444 (CVSS 6.3) — A security flaw has been discovered in Tor up to 0.4.7.16/0.4.8.17. Impacted is an unknown function of the com…
    CVE-2012-3518 (CVSS 5) — The networkstatus_parse_vote_from_string function in routerparse.c in Tor before 0.2.2.38 does not properly ha…
    CVE-2012-3519 (CVSS 5) — routerlist.c in Tor before 0.2.2.38 uses a different amount of time for relay-list iteration depending on whic…
    CVE-2011-4894 (CVSS 4.3) — Tor before 0.2.2.34, when configured as a bridge, uses direct DirPort access instead of a Tor TLS connection f…
    CVE-2011-2769 (CVSS 4.3) — Tor before 0.2.2.34, when configured as a bridge, accepts the CREATE and CREATE_FAST values in the Command fie…
    CVE-2011-4895 (CVSS 4.3) — Tor before 0.2.2.34, when configured as a bridge, sets up circuits through a process different from the proces…
    CVE-2011-4897 (CVSS 4.3) — Tor before 0.2.2.25-alpha, when configured as a relay without the Nickname configuration option, uses the loca…
    CVE-2011-2778 (CVSS 7.6) — Multiple heap-based buffer overflows in Tor before 0.2.2.35 allow remote attackers to cause a denial of servic…
    CVE-2011-4896 (CVSS 4.3) — Tor before 0.2.2.24-alpha continues to use a reachable bridge that was previously configured but is not curren…
    CVE-2011-2768 (CVSS 5.8) — Tor before 0.2.2.34, when configured as a client or bridge, sends a TLS certificate chain as part of an outgoi…

    References

    http://lists.fedoraproject.org/pipermail/package-announce/2012-September/088006.html
    http://lists.opensuse.org/opensuse-updates/2012-08/msg00048.html
    http://openwall.com/lists/oss-security/2012/08/21/6
    http://security.gentoo.org/glsa/glsa-201301-03.xml
    https://bugzilla.redhat.com/show_bug.cgi?id=849949
    https://gitweb.torproject.org/tor.git/commit/62637fa22405278758febb1743da9af562524d4c
    https://lists.torproject.org/pipermail/tor-announce/2012-August/000086.html
    https://trac.torproject.org/projects/tor/ticket/6480
    http://lists.fedoraproject.org/pipermail/package-announce/2012-September/088006.html
    http://lists.opensuse.org/opensuse-updates/2012-08/msg00048.html
    http://openwall.com/lists/oss-security/2012/08/21/6
    http://security.gentoo.org/glsa/glsa-201301-03.xml
    https://bugzilla.redhat.com/show_bug.cgi?id=849949
    https://gitweb.torproject.org/tor.git/commit/62637fa22405278758febb1743da9af562524d4c
    https://lists.torproject.org/pipermail/tor-announce/2012-August/000086.html
    https://trac.torproject.org/projects/tor/ticket/6480

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High